Brain problems killed Knut the polar bear, says Berlin zoo

New York, March 23: Berlin Zoo officials have claimed that Knut the polar bear died of unspecified brain problems.

The 4-year-old celebrity polar bear collapsed in his containment on Saturday in front of several hundred visitors, reports the New York Daily News.

Early findings from a necropsy performed Monday showed "significant changes to the brain, which can be viewed as a reason for the polar bear''s sudden death," the zoo said in a statement.

The zoo didn''t elaborate on what exactly was wrong with the bear''s brain, but it said pathologists found no damage to any other organs.

Further tests were planned, according to the officials.

According to a video shot by a tourist, the addled bear could be seen compulsively turning in circles for several minutes before collapsing into a pool of water. (ANI)